Headphone Out:This is a stereo headphone output on a I/4"TRS jack. Connect only a stereo plug to this jack.

Headphone Level: This knob controls the level of the stereo output signal sent to the headphone jack.

Output Level:This knob controls the level of the stereo output signal sent to the RCA analog output jacks.

MIDI In: This 5-pin DIN accepts MIDI data from any external MIDI device via a standard MIDI cable, supporting up to 16-channels of MIDI data on a single cable.

MIDI Out: This 5-pin DIN outputs MIDI data to any external MIDI device via a standard MIDI cable, supporting up to 16-channels of MIDI data on a single cable.

Power Indicator LED: When power is supplied to the Audiophile, this LED will light and remain lit.

Power Switch (On/Off): Pressing this switch and locking to the "in" position will apply power to the Audiophile USB, provided that the proper power supply is attached correctly. This is the power "On" position.To switch power "Off," press in and release this switch to the "out" position.

Left Input and Right Input (I/4" Analog lnputs):These jacks input analog audio from a variety of external sources. Each jack is female 1/4" tip-sleeve, compatible with common male I/4"TS cables. When plugs are inserted into these jacks, the RCA inputs are defeated.

Left Input and Right Input (RCA Analog Inputs): These jacks input analog audio from a variety of external sources. Each jack is female RCA, compatible with common male RCA cables. When plugs are inserted into the 1/4" jacks, these RCA inputs are defeated.

Left Output and Right Output (RCA Analog Outputs): These jacks output analog audio to a variety of external destinations. Each jack is female RCA, compatible with common male RCA cables.

S/PDIF In: This RCA connector receives a S/PDIF signal from your coaxial S/PDIF digital source such as a DAT, MiniDisc player or external A/D converter. Use a quality digital cable, rated at 75 Ohms.

S/PDIF Out:This RCA connector sends a S/PDIF signal to your coaxial S/PDIF digital target device such as a DAT, MiniDisc player or external D/A converter. This output is also used as a digital multi-channel surround output (Dolby, DTS,etc.) for DVD or Home Theater use. Use a quality digital cable, rated at 75 Ohms.

USB Jack: This standard USB connector connects to the "device end" of a standard USB cable (included).

9V AC 1000 mA PSU Jack: This jack connects to the included power supply, which connects to common house current. Use only a 2.5mm plug with a 9V AC, 1000 mA power rating. Using any other power supply could give undesirable results and/or damage the Audiophile USB.